The binding legal principles established are: (1) A special power of attorney that authorizes representation in respect of a property dispute extends to related derivative proceedings such as condonation applications arising from the main matter. (2) An affidavit by a legal practitioner holding a power of attorney complies with rule 58(4) where the deponent addresses matters within his personal knowledge arising from his conduct of the litigation, such as timelines and procedural events. (3) In applications for condonation of late filing, where the delay is minimal (less than seven days), there is no gross dereliction by legal practitioners, the matter raises triable issues, and parties have been engaged in protracted litigation requiring finality, condonation should generally be granted with costs protecting the prejudiced party. (4) Non-payment of costs in a previous matter does not render a party improperly before the court under the 'dirty hands' doctrine; such concerns are addressed through mechanisms like rule 74 for securing costs.